Device properties and degradation mechanisms of organic light-emitting diodes composed of organic layers with orientation polarization

定向偏振有机层组成的有机发光二极管的器件性能和退化机制

• 批准号: 22750167
• 负责人: NOGUCHI Yutaka
• 金额: $ 2.58万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22750167/
• 关键词: 有機EL素子; 配向分極; 永久双極子; 電荷蓄積; 劣化機構; 界面電荷; 変位電流法

Findings of this study are as follows : 1) Several polar molecules that are commonly used in organic semiconductor devices spontaneously forms orientation polarization in their evaporated films. 2) The origin of interface charge at organic hetero interfaces is polarization charge originating from the orientation polarization. 3) Presence of polar molecules in the vicinity of organic hetero interface suppresses charge dispersion. 4) Light irradiation during the film formation of a polar molecule changes the charge accumulation property in the resultant devices, and causes a shorter lifetime. These findings indicate that permanent dipole moment is an important parameter that strongly affects on the device properties of organic semiconductor devices.

本研究结果如下：1)有机半导体器件中常用的几种极性分子在其蒸发膜中自发形成取向极化。2)有机异质界面电荷的来源是取向极化产生的极化电荷。3)极性分子在有机异质界面附近的存在抑制了电荷的色散。4)极性分子成膜过程中的光照射改变了所合成器件中的电荷积累特性，从而缩短了器件的寿命。这些发现表明，永久偶极矩是影响有机半导体器件性能的重要参数。

项目成果

Interface charges and orientation polarization in organic light-emitting diodes

有机发光二极管中的界面电荷和取向偏振

• 发表时间: 2010
• 作者: S.Mizukami;D.Watanabe;F.Wu;T.Kubota;H.Naganuma;M.Oogane;A.Sakuma;Y.Ando;T.Miyazaki;梶弘典(Invited);松下諒平・楊成・森直・福原学・井上佳久;幸田みゆき;Yutaka Noguchi
• 通讯作者: Yutaka Noguchi

Light- and ion-gauge-induced space charges in tris-(8-hydroxyquinolate) aluminum based organic light-emitting diodes

三（8-羟基喹啉）铝基有机发光二极管中光和离子规诱导的空间电荷

• 发表时间: 2010
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: Yutaka Noguchi;Naoki Sato;Yukimasa Miyazaki;Hisao.Ishii
• 通讯作者: Hisao.Ishii

Charge accumulation mechanisms at organic hetero interfaces : effects of interface charges and orientation polarization

有机异质界面的电荷积累机制：界面电荷和取向极化的影响

• 发表时间: 2010
• 作者: Yukimasa Miyazaki;Yutaka Noguchi;Yasuo Nakayama;Wolfgang Bruetting;Hisao Ishii
• 通讯作者: Hisao Ishii

Charge accumlation mechanisms at organic hetero interfaces : Interface charge and orientation polarization

有机异质界面的电荷积累机制：界面电荷和取向极化

• 发表时间: 2010
• 作者: Yutaka Noguchi;Yukimasa Miyazaki;Yasuo Nakayama;Wolfgang Bruetting;Hisao Ishii
• 通讯作者: Hisao Ishii

Alq3を用いた有機EL素子の界面電荷と劣化挙動

使用 Alq3 的有机 EL 器件的界面电荷和劣化行为

• 发表时间: 2011
• 作者: Saito;K. and M. Kunii;田村駿光
• 通讯作者: 田村駿光